Cathy and Grant,
One of my Machines, the Minnesota B uses a drive pulley with a grove for a belt and a friction drive wheel. The end is hollow and flared over the outer wheel. The rubber drive wheel between them. I removed the rubber drive wheel then pushed the outer metal wheel in and filed off the flared part. Removed the metal wheel, put 2 3/8" grommets on the shaft then put the outer metal wheel on and tightened the set screw. Works beautifully and is easily replaced when needed. One of these days though I'll try rubber hose or perhaps bobbin winding tires.
Joe